The division between this genus and Agaricus is not always sharply defined. S. æruginosa, S. semiglobata and S. stercoraria were formerly placed in Psalliota, now Agaricus.

ANALYSIS OF TRIBES.

A. Viscipelles (viscum, bird-lime; pellis, a skin). Page [349].

Pellicle of the pileus even or scaly, generally viscid.

[*] Mundi—mundus, clean. Not growing on dung.

[**] Merdarii—merda, dung. Ring often incomplete.

B. Spintrigeri (Stropharia spintriger).

Pileus without a pellicle, but fibrillose, not viscid. None known to be edible.

A. Viscipelles. Pellicle of the pileus even or scaly.

* Mun´di—not growing on dung.